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大尾巴:听说狗经常把舌头伸在外面是因为它的汗腺长在舌头上,所以它要通过吐舌头来排汗。我在《动物世界》里经常看到蛇不论热不热都把舌
Big Tail: I heard dogs often put their tongue out because it’s sweat glands grow on the tongue, so it is through the tongue to sweat. I often see in the “animal world” that snakes put their tongues whether it’s hot or not